EP2468494B1 - Tuyau flexible pour liquides doté de deux couches internes en élastomère - Google Patents

Tuyau flexible pour liquides doté de deux couches internes en élastomère Download PDF

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Publication number
EP2468494B1
EP2468494B1 EP20100196272 EP10196272A EP2468494B1 EP 2468494 B1 EP2468494 B1 EP 2468494B1 EP 20100196272 EP20100196272 EP 20100196272 EP 10196272 A EP10196272 A EP 10196272A EP 2468494 B1 EP2468494 B1 EP 2468494B1
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EP
European Patent Office
Prior art keywords
inner layer
elastomeric inner
elastomeric
layer
hose
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20100196272
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German (de)
English (en)
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EP2468494A1 (fr
Inventor
Christian Kuenstel
Juergen Schmidt
Frank Wilczek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Industrial IP GmbH and Co KG
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Eaton Industrial IP GmbH and Co KG
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Priority to ES10196272T priority Critical patent/ES2426968T3/es
Priority to EP20100196272 priority patent/EP2468494B1/fr
Publication of EP2468494A1 publication Critical patent/EP2468494A1/fr
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Publication of EP2468494B1 publication Critical patent/EP2468494B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/16—Layered products comprising a layer of natural or synthetic rubber comprising polydienes homopolymers or poly-halodienes homopolymers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
    • F16L11/082—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire two layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
    • F16L11/086—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers two layers

Definitions

  • the present invention refers to a flexible fluid hose, which is particularly suitable for high pressure applications.
  • the hose contains several layers, which are made of different materials. The different layers are provided in order to achieve the desired characteristics of the hose such as pressure stability or temperature resistance.
  • a hose for use in automotive power steering applications is disclosed in EP 1 363 059 A1 .
  • This hose contains an inner tube, at least one reinforcing layer and a cover layer.
  • the inner tube is formed of at least an innermost rubber layer and an adjacent thermoplastic layer.
  • the innermost layer is formed of a rubber compound such as nitrile butadiene rubber (NBR), hydrogenated nitrile butadiene rubber (HNBR), chlorosulfonated polyethylene rubber (CSM) or chlorinated polyethylene (CPE).
  • the thermoplastic layer is formed of a high modulus plastic material.
  • the innermost layer made of HNBR is able to withstand chemical and temperature degradation.
  • HNBR material is expensive.
  • the thermoplastic layer adjacent to the innermost HNBR layer has the disadvantage that the connection to a reinforcing layer around the thermoplastic layer is insufficient. Particularly the bond between the thermoplastic material and steel wires of the reinforcing layer is non-satisfactory. Therefore, an additional layer between the wires of a reinforcement layer and the thermoplastic layer is necessary.
  • a reinforced rubber hose that has an inner tube consisting of two layers.
  • the inner-tube outside layer is formed of a vulcanized diene rubber composition
  • the inner-tube inside layer is formed of a vulcanized hydrogenated nitrile rubber composition.
  • the inner tube is covered by a reinforcement yarn layer.
  • the flexible fluid hose contains a first elastomeric inner layer defining a fluid channel of the hose.
  • the first elastomeric inner layer consists of hydrogenated nitrile butadiene rubber (HNBR). This rubber material provides a good temperature and chemical resistance and ensures a high lifetime of the hose.
  • a second elastomeric inner layer directly encases the first elastomeric inner layer. This second elastomeric inner layer is provided to give a sufficient mechanical strength to the first inner layer of the hose.
  • the second elastomeric inner layer is made of a standard nitrile butadiene rubber (NBR) material.
  • NBR nitrile butadiene rubber
  • the first elastomeric inner layer is less thick than the second elastomeric inner layer. Due to this the costs for the hose can be reduced.
  • the thickness of the fist elastomeric inner layer is preferably at most 50% or more preferably at most 30% of the thickness of the second e
  • both inner layers are made of elastomeric material the hose can comply with the standard according to DIN EN 856. Thermoplastic material is avoided in the layers of the inventive hose.
  • the two elastomeric inner layers provide a sufficient connection with each other and are also easily connectable to further layers.
  • Attached to the second elastomeric inner layer is a reinforcing layer containing reinforcing material, such as for example spiraled or braided or knitted reinforcement material.
  • the reinforcement material contains metal wires. Such reinforcement material gives the hose high pressure resistance.
  • the second inner layer is made of elastomeric material a good bond can be achieved between the reinforcement material and the second elastomeric inner layer.
  • the first elastomeric inner layer can easily be produced by extrusion particularly directly on a mandrel.
  • the extruded first elastomeric inner layer can be put on the mandrel after extrusion.
  • the second elastomeric inner layer is made of an elastomeric ribbon, which is wrapped around the first elastomeric inner layer. In so doing the thickness of the second elastomeric inner layer can easily be varied during the production of different hose types.
  • a standard elastomeric ribbon can be provided for the manufacturing process.
  • the second elastomeric inner layer is attached to the first elastomeric inner layer by providing a chemically connection.
  • No intermediate layer is provided for connecting the two elastomeric inner layers.
  • the chemically connection is implemented by vulcanisation.
  • the flexible house 10 is shown which is particularly suitable for high pressure applications where the fluid pressure conveyed in the hose 10 is at least 400 bar.
  • the hose 10 contains several layers, which perform different functions and which are schematically illustrated in figures 1 and 2 .
  • the different layers are arranged coaxially to a longitudinal axis 11 of the hose 10.
  • the hose 10 contains for layers 12.
  • a first inner elastomeric layer defines a fluid channel 14 along the longitudinal axis 11 of the hose.
  • the fluid channel 14 has the diameter D.
  • HNBR hydrogenated nitrile butadiene rubber
  • Adjacent to the first elastomeric inner layer 13 a second elastomeric inner layer 15 is provided.
  • the second elastomeric inner layer 15 is directly attached to the outer surface 16 of the first elastomeric inner layer 13. Between the two elastomeric inner layers 13, 15 no intermediate layer is provided. Direct connection between the two elastomeric inner layers 13, 15 is implemented.
  • a zone Z of chemical connection is provided in which the two layers are connected with each other.
  • the thickness of the zone Z is smaller than the first thickness w1 of the first elastomeric inner layer 13 and the second thickness w2 of the second elastomeric inner layer 15.
  • the two elastomeric inner layers 13, 15 can be denoted as inner tube 17 of the flexible hose 10.
  • the material used for the two elastomeric inner layers 13, 15 is different.
  • the second elastomeric inner layer 15 is made of a standard polymer material like nitrile butadiene rubber (NBR). It could also be made of a fluorocarbon polymer.
  • NBR nitrile butadiene rubber
  • the first wall thickness w1 of the first elastomeric inner layer 13 is smaller than the second wall thickness w2 of the adjacent second elastomeric inner layer 15.
  • the first wall thickness w1 corresponds to at most 50% or at most 30% of the second wall thickness w2.
  • the total wall thickness w1 + w2 of the inner tube 17 is predefined to provide a sufficient mechanical strength of the inner tube 17.
  • the material and the dimensions of the second elastomeric inner layer 15 mainly define the mechanical strength of this inner tube 17.
  • the reinforcing layer 21 contains reinforcement material 22.
  • the reinforcement material 22 includes filaments 23 or fibers.
  • the filaments 23 can for example form spiraled or braided or knitted plies or layers of reinforcement material 22.
  • metal wires in multiple plies are used as reinforcement material 22 as schematically shown in figures 1 and 2 .
  • the number of plies of metal wires which form the reinforcing layer 21 can be varied according to the required pressure resistance of the hose 10.
  • a glass fiber webbing 24 can be provided between two adjacent plies of metal wires.
  • This glass fiber wedding 24 can additionally strengthen the hose 10.
  • the wall thickness of the glass fiber webbing 24 can be kept small and thus a hose 10 with a small outer diameter can be provided having a remarkable pressure resistance.
  • the filament 23 of the reinforcing layer 21 and/or the fibers of the glass fiber webbing 24 can be arranged in circumferential direction and/or in longitudinal dimension and/or helically around the second elastomeric inner layer 15.
  • the reinforcing layer 21 is covered at its outer surface 25 by a cover layer 26.
  • the cover layer 26 can be of a suitable material, preferably polymeric rubber.
  • the described flexible hose 10 is manufactured as follows.
  • the inner hose 17 is produced.
  • Hydrogenated nitrile butadiene rubber (HNBR) is extruded on a mandrel to produce the first elastomeric inner layer 13.
  • HNBR Hydrogenated nitrile butadiene rubber
  • the extruded first elastomeric inner layer 13 can also be placed on the mandrel after extrusion.
  • a ribbon 30 of elastomeric material such as NBR is helically wrapped around the outer surface 16 of the first elastomeric inner layer 13.
  • the second wall thickness w2 of the second elastomeric inner layer 15 can in this way easily be varied according to the requirements, particularly depending on the desired mechanical strength of the inner tube 17.
  • the two elastomeric inner layers 13, 15 are directly arranged adjacent to each other and chemically connected by vulcanisation.
  • the reinforcing layer 21 is attached to the outer surface 20 of the second elastomeric inner layer 15.
  • the reinforcing layer 21 contains metal wires as reinforcing filaments 23.
  • the second elastomeric inner layer consists of elastomeric material a good connection to the reinforcing layer 21 is achieved because the elastomeric material provides good adhesion to the metal wires.
  • the reinforcing layer 21 is covered by a cover layer 26 which can be extruded on the outer surface 25 of the reinforcing layer 21.
  • the present invention refers to hose 10, which is suitable for high pressure applications and a method for producing same.
  • the hose 10 contains a flexible inner tube 17.
  • the inner tube 17 is made of two different elastomeric materials.
  • a first elastomeric inner layer 13 defines a fluid channel 14 of the hose 10 along its longitudinal axis 11.
  • a second elastomeric inner layer 15 is attached.
  • the first elastomeric inner layer 13 is made of hydrogenated nitrile butadiene rubber (HNBR).
  • the second elastomeric inner layer is preferably made of nitrile butadiene rubber (NBR).
  • the two inner layers 13, 15 are connected to each other by a vulcanization process.
  • a reinforcing layer 21 is provided which is covered by a cover layer 26. Between the reinforcing layer 21 and the inner tube 17 no additional intermediate layers are provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Claims (10)

  1. Flexible produit (10) en particulier pour les applications à pression de fluide élevée,
    ayant une première couche élastomère intérieure (13), qui définit un canal de fluide (14) le long de l'axe longitudinal (11) du tuyau flexible (10), où la première couche élastomère intérieure (13) est fabriquée en caoutchouc nitrile hydrogéné (HNBR),
    ayant une seconde couche élastomère intérieure (15), qui est directement fixée à la surface extérieure (16) de la première couche élastomère intérieure (13),
    ayant une couche de renforcement (21), qui est fixée sur la surface extérieure (20) de la seconde couche élastomère intérieure (15) et qui contient un matériau de renforcement (22), où la seconde couche élastomère intérieure (15) est composée de caoutchouc nitrile (NBR), caractérisée en ce que le matériau de renforcement (22) contient des fils métalliques.
  2. Flexible produit (10) selon la revendication 1, où la couche de renforcement (21) contient un matériau de renforcement en spirale, tressé ou à mailles (22).
  3. Flexible produit (10) selon la revendication 1, où l'épaisseur de paroi (w1) de la première couche élastomère intérieure (13) est inférieure à l'épaisseur de paroi (w2) de la seconde couche élastomère intérieure (15).
  4. Flexible produit (10) selon la revendication 1, où la première couche élastomère intérieure (13) est produite par extrusion.
  5. Flexible produit (10) selon la revendication 1, où la seconde couche élastomère intérieure (15) est composée d'un ruban élastomère (30), qui est enroulé en hélice autour de la première couche élastomère intérieure (13).
  6. Flexible produit (10) selon la revendication 1, où la seconde couche élastomère intérieure (15) est liée chimiquement à la première couche élastomère intérieure (13).
  7. Flexible produit (10) selon la revendication 1, où la surface extérieure de la couche de renforcement (21) est recouverte d'une couche de protection (26).
  8. Méthode de fabrication d'un flexible produit (10),
    - extrusion de caoutchouc nitrile hydrogéné (HNBR) pour former une première couche élastomère intérieure (13), qui définit un canal de fluide (14) le long de l'axe longitudinal (11) du tuyau flexible (10),
    - ce qui produit une seconde couche élastomère intérieure (15) et fixe une seconde couche élastomère intérieure (15) directement sur la surface extérieure de la première couche élastomère intérieure (13),
    - ce qui produit une couche de renforcement (21) contenant un matériau de renforcement (22) et fixant la couche de renforcement (21) directement sur la surface extérieure (20) de la seconde couche élastomère intérieure (15), caractérisée par la seconde couche élastomère intérieure (15) comprenant du caoutchouc nitrile (NBR) et la couche de renforcement (21) contient des fils métalliques.
  9. Méthode selon la revendication 11, où la production de la seconde couche élastomère intérieure (15) comprend l'enroulage en hélice d'un ruban élastomère (30) autour de la surface extérieure (16) de la première couche élastomère intérieure (13) et produit une liaison chimique avec la première couche élastomère intérieure (13).
  10. Méthode selon la revendication 12, où la liaison chimique entre la première et la seconde couches élastomères intérieures (13, 15) est produite par vulcanisation.
EP20100196272 2010-12-21 2010-12-21 Tuyau flexible pour liquides doté de deux couches internes en élastomère Active EP2468494B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES10196272T ES2426968T3 (es) 2010-12-21 2010-12-21 Manguera de fluidos flexible con dos capas internas elastoméricas
EP20100196272 EP2468494B1 (fr) 2010-12-21 2010-12-21 Tuyau flexible pour liquides doté de deux couches internes en élastomère

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100196272 EP2468494B1 (fr) 2010-12-21 2010-12-21 Tuyau flexible pour liquides doté de deux couches internes en élastomère

Publications (2)

Publication Number Publication Date
EP2468494A1 EP2468494A1 (fr) 2012-06-27
EP2468494B1 true EP2468494B1 (fr) 2013-08-14

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EP20100196272 Active EP2468494B1 (fr) 2010-12-21 2010-12-21 Tuyau flexible pour liquides doté de deux couches internes en élastomère

Country Status (2)

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ES (1) ES2426968T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20154575A1 (it) * 2015-10-12 2017-04-12 Deregibus Tubigomma Tubo per fluidi alimentari caldi

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3319309B2 (ja) * 1996-10-18 2002-08-26 豊田合成株式会社 補強ゴムホース
US6261657B1 (en) * 1999-04-26 2001-07-17 The Goodyear Tire & Rubber Company Hose construction containing fluoroplastic terpolymers
JP3941102B2 (ja) * 2002-03-28 2007-07-04 東海ゴム工業株式会社 耐熱燃料ホース
JP2003336772A (ja) 2002-05-17 2003-11-28 Goodyear Tire & Rubber Co:The パワーステアリングホース

Also Published As

Publication number Publication date
ES2426968T3 (es) 2013-10-28
EP2468494A1 (fr) 2012-06-27

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